Chem 6B

Chem 6B - component must be calculated first: hexane 1...

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8.72 (a) To determine the vapor pressure of the solution, we need to know the mole fraction of each component. hexane cyclohexane hexane total 0.25 mol 0.28 0.25 mol 0.65 mol 1 0.72 (0.28 151Torr) (0.72 98 Torr) 113 Torr x x x P = = + = − = = × + × = The vapor phase composition will be given by hexane hexane in vapor phase total cyclohexane in vapor phrase 0.28 151Torr 0.37 113 Torr 1 0.37 0.63 P x P x × = = = = − = The vapor is richer in the more volatile cyclohexane, as expected. (b) The procedure is the same as in (a) but the number of moles of each
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Unformatted text preview: component must be calculated first: hexane 1 cyclohexane 1 hexane cyclohexane hexane total 10.0 g 0.116 86.18 g mol 10.0 g 0.119 84.16 g mol 0.116 mol 0.494 0.116 mol 0.119 mol 1 0.506 (0.494 151Torr) (0.506 98 Torr) 124 Torr n n x x x P = = = = = = + = = = + = The vapor phase composition will be given by hexane hexane in vapor phase total cyclohexane in vapor phase 0.494 151Torr 0.602 124 Torr 1 0.602 0.398 P x P x = = = = =...
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This note was uploaded on 01/30/2012 for the course CHEM 6B taught by Professor Crowell during the Spring '08 term at UCSD.

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